Water → 7-tert-butoxycarbonyl-2-oxohexahydro-3,5-methano-2H-cyclopenta[b]furan-6-yl 2-(methacryloyloxy)-acetate

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Reaction Steps

In 800 ml of dimethylformamide were dissolved 199 g of the 2-chloroacetate obtained in Example 1-6-1, 64.8 g of methacrylic acid, and 4.50 g of sodium iodide. To the solution below 30° C., 73.1 g of triethylamine was added dropwise. The reaction solution was stirred at the temperature overnight, whereupon 500 ml of deionized water below 30° C. was added, followed by ordinary workup. Recrystallization from hexane yielded 209 g of the title compound. Yield 91%.

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